I used to get annoyed when some of our people practiced dropping a round directly into the chamber of our S&W 3rd gen's, but that was because I disliked having to replace/fit new extractors just because of someone's carelessness with an issued weapon. Ditto other brands, like Glocks & SIG's.
The spring-type internal 1911 extractor was designed to be stressed a certain way, and having to snap out & around a chambered round's case rim wasn't it. I've seen my share of 1911 extractor's suffer a loss of tension when loading the chamber directly (not from the magazine) was a frequent practice.
While most of the pistol armorer classes I've attended over the years have included warnings against directly loading barrel chambers, to help prevent damage to extractors, I found it interesting back when I attended my first M&P pistol armorer class in '07.
The instructor said that the then-new M&P extractor had been designed to have an especially robust forward shoulder. This was reportedly done in the event that a user had to perform a malfunction clearance practice that involved letting the slide run forward against a chambered round that was faulty (failed to fire, etc) and had to be extracted/ejected so a fresh round could be fed & chambered.
While they still didn't recommend loading the chamber directly as a regular practice, their engineers had made the extractor more robust to better allow the extractor's hook to withstand any emergency stress involved in some clearance manipulations. I thought that was interesting. They refer to the M&P extractor as a MIM "I-Beam" design, and the leading edge of the hook is certainly thick and robust. It's tall enough that the extractor has to be canted in order for the hook to clear the ejection port and position the extractor to be installed in the slide, unlike the narrower 3rd gen/SW1911 extractors that easily slip into the recess.
Anyway, while I used to find it annoying that some owners/users would seemingly be willing to abuse their pistol extractors, I got over such annoyance the longer I've been an armorer supporting different makes/models. I can always spend a little bench time to correct, repair or replace something damaged by someone.
However, in the long run, if someone ends up doing something that causes damage to their weapon (whether issued or personally-owned) which compromises its integrity and ability to properly function ... it's not my immediate problem. It's their problem. Sometimes you can't save the world, let alone some people from themselves.
At least on a range (whether for training or sport/competition) such problems only cause loss of time or score, and people have the opportunity to learn from their mistakes. If they're willing.
